Correlation between the Changes of Oxidation Reduction Potential Values and Post-mortem Interval of Heart Blood in Rabbits after Death / 法医学杂志

ABSTRACT

Objective To investigate correlation between the changes of oxidation reduction potential (ORP ) values of heart blood in rabbits after death and postm ortem interval (PMI) at different temperatures. Meth-ods Forty-eight rabbits were random ly divided into 6 groups and sacrificed by air em bolism . Blood sam-ples were taken from the right ventricle of each rabbit and stored at different temperatures of 10, 15, 20, 25, 30and 35℃, respectively. Every 4 hours from 0h to 132 hpostm ortem , the ORP values of the blood samples were measured at different intervals by PB-21 electrochem ical analyzer. The curvilinear regres-sion equation was established by SPSS 17.0software. The surface equation and 3D surface diagram were established by MATL A B7.10.0software. Results The ORP values at different temperatures of heart blood in rabbits were highly correlated with the PMI. The ORP values rised obviously when the temper-ature was high and rised slowly when the temperature was low. The surface equation and 3D surface diagram were obtained. Conclusion The surface equation and 3D surface diagram of ORP values and PMI may be used for PMI estimation at different temperatures.